I am not a fan of multi-tools on the trail for lots of reasons...but wouldn't a simple Swiss Army knife meet most of your requirements? Don't some of them have locking blades? Some of them certainly have scissors...although no manly man is going to carry a tool that as a primary purpose as a pair of scissors!

If a scissors and a locking blade are necessities, then perhaps look at a manicure scissors and an Opinel knife, rather than trying to pull it all together as a multi-tool? I think you could get those two dedicated tools to come in under 4 ounces.

I am not a fan of multi-tools on the trail for lots of reasons...but wouldn't a simple Swiss Army knife meet most of your requirements? Don't some of them have locking blades? Some of them certainly have scissors...although no manly man is going to carry a tool that as a primary purpose as a pair of scissors!

Curious, what is it that you don't like about multi tools? What do you use? (Note, I don't necessarily disagree)

I own many multi-tools, but never hike with them. Too heavy, too many tools that serve no purpose on the trail. My primary knife when hiking is a Swiss Army Classic....the tiniest one they make! Has scissors, tweezers, tooth pick, nail file, screw driver, blade, all in about an ounce. If I need a locking blade, which is rare, I'll carry a retasked kitchen boning knife, again very lightweight and strong. Leatherman makes an S4 Squirt with scissors as it's primary tool, but no locking blade. It's a 2 oz. tool. I have the version with pliers as the primary and carry it often, but not hiking.

I'm currently carrying a Leatherman Squirt PS4 - knife blade, a couple of screwdriver/nail file tools, pliers, scissors, and small knife; I also carry a small tweezers, since they aren't on the tool. So far, I like the PS4, though I'm still not sure I'll stick with it - something in me always whispering that something designed to do several things doesn't do any of them well. Previously, I carried a Gerber LST Mini lockback pocketknife, folding Fiskars scissors, and tweezers. The PS4 and tweezers weigh the same as the separate knife/scissors/tweezers, but I miss the lockback feature. (I've never had any problems with the non-locking blade.) The extra tools have been somewhat useful: the pliers make a passable pot grabber if the handles get hot or I want to pull the tight-fitting lid off. I've used the screwdriver blades for several things (prying battery covers off headlamps), but not for screwing screws. The scissors are a bit small for serious cutting, but work fine on moleskin and freeze-dried food, or trimming finger or toe nails. Oddly, the knife is what I use least often.

The Leatherman Squirt PS4 is my go-to knife. It weighs 1.9 oz., has pliers, scissors, etc. There used to be a version that had the scissors as the primary tool, but I didn't look to see if it's still there--look at the Leatherman site to find out. The blade doesn't lock, but I've never used a knife with a locking blade and never have missed it. My first instructions in using a knife (at age 6) stressed that I never rely on the knife to stay open and handle it accordingly. On th other hand, I've never had the blade of mine ever try to close on me when i'm using it.

I use the pliers a lot, primarily as a pot-grabber, but also when threading straps through buckles and other such tasks--I don't have enough fingertip strength to grasp the tiny edge of the strap and pull it through. The pliers are also useful for fishing. For me, those pliers are essential! Other blades I use are the largest screwdriver (to help push webbing straps through tight buckles, or to loosen them for adjustment, or for various prying tasks), the file (for my frequently splitting fingernails), the scissors (for trimming my frequent hangnails and Bandaids as well as for manicure/pedicure), the smallest screwdriver for tightening the screws on my glasses. I even use the knife blade on occasion.

For me, for less than an ounce more than the tiny Swiss knife, the additional functions of the Squirt are well worth it. Buy a knife to suit your individual needs, not for what others tell you. Just don't spend additional money/weight on functions you'll rarely, if ever, use.

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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey

Maybe check out the Leatherman Style CS (not the PS, as it doesn't have a blade and is built around little pliers).It's main tool is the scissors. The blade doesn't lock, but at least it's only about $20 and the handle is a little larger than the Squirt or Micra.

I actually have a Style PS, or at least I did before I gave it to my son. I don't remember why I decided I didn't like it. I also had a Squirt at one point and lost it along with my entire FAK. I miss that one, but I've been eyeing the Micra for the longest time. I've been hiking with the little 1oz SAK, but I can imagine scenarios where that wouldn't be sufficient. Right now, I'm considering the merits of separate tools (Fiskars or Slip n Snip folding scissors, tiny homemade fixed-blade knife, and maybe even a tiny pair of jeweler's pliars). I can never make up my mind. BTW, the homemade knife hasn't been made yet, it's just an idea.